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How well a window insulates your home is important; if it insulates your home poorly, more heat or air condition is able to escape, meaning more energy is required to heat or cool your home. The problem with this is being that energy costs money. So the more the use, the more you pay. Therefore, it’s important to understand what to look out for when looking at how energy efficient a set of windows are.

U Values

Another method for measuring the thermal performance of a window is to look at its U-value. They are calculated by the equation W/m2k, which measures heat loss in watts (W) per square meter of material, when the temperature (k) outside is at least one degree lower. The lower the U value, the better the insulation the material provides. For materials with a U value of 0, no heat is able to escape.


If you’re looking to replace single glazed windows with double glazing, you’ll notice a significant difference in the amount of noise making its way inside your home. In short, your home will be considerably quieter than before. However, if you happen to reside near a busy road, a train line or other noisy location, specific acoustic glazing is recommended as it provides additional insulation from sound.

Double glazing ensures for strong levels of energy efficiency,Double Glazing ensures security and soundproofing, resulting in a comfortable, secure home environment. For most homes, this option will be more than adequate.

Double glazed windows are made up of two panes of glass which are separated by a small cavity. This small cavity is usually filled with an inert gas, such as Argon, however sometimes a vacuum is used. The combination of the cavity and inert gas reduces the amount of heat that’s able to escape, or enter your home through the window considerably.

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